I have lower jaw pain under ear and Neck for 8 months now. I have been to dentists, endodontist, oral surgeon, ENT, neurologist GP for my jaw and neck pain. It's constant sore,burning pain in jaw under ear and neck. I have small lump like spots in jaw under ear and neck which hurts to touch. I have mild swelling spots in under ear jaw and neck which is tender and sore. Neuro want me to take mri brain with contrast to see if nerve is ok.  I went to my GP.  My GP wanted me to take CT neck scan with contrast instead of MRI. So don't know which one to take. dentist suspect tooth fracture in #46 and said to extract it. Endo couldn't see any fracture. it's confusing and no diagnosis. I did rct on#46 and still same symptoms. I had many digital dental x-rays, 6 pan xrays, 3 dental CBCT scan since June. can we take so many cbct and x-rays in 7 months? can I take neck CT scan with contrast now? is it harmful to have so much radiation in short time? I had 3 dental CBCT so far in 7 months.